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Date: Tue, 02 Dec 2025 14:00:32 -0600
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Subject: Re: [PHP-DEV] [RFC] Pattern Matching
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From: larry@garfieldtech.com ("Larry Garfield")

On Tue, Dec 2, 2025, at 12:26 AM, Dmitry Derepko wrote:

> Thank you for the RFC and that you included option with match and=20
> individual IS=E2=80=99s, I think it would be preferable option not to =
break the=20
> match construction.=20
>
> Regarding the patterns, is there a way to declare and reuse the=20
> patterns? Assign it to a variable and use it as =E2=80=9Cis $pattern=E2=
=80=9D or=20
> something like that. Maybe as a separate class =E2=80=9C$pattern->matc=
h($var)=E2=80=9D.=20
> While it=E2=80=99s not reusable it looks like it has a limited scope t=
o use it,=20
> otherwise regular replacements preferred.=20

Not currently, no.  It's something we've discussed, but it's also kinda =
hard, and I don't believe any other languages do it.

What you could do is just wrap it in a short closure.

$pattern =3D fn($x) =3D> $x is some|Pattern|null;

$pattern($something);

I'd love to have a way to shorten that, but so far we haven't come up wi=
th one.  Suggestions welcome, as I'd love to be able to do something lik=
e this (obviously not exactly this):

$filtered =3D array_filter($arr, is Point(x: <10));

--Larry Garfield